On Fri, 16 Feb 2007 09:43:20 -0800 Rick Jones <[EMAIL PROTECTED]> wrote:
> kalyan tejaswi wrote: > > Hi all, > > I have been comparing bridging performance for 2.6.20 and 2.6.19 > > kernels. The kenel configurations are identical for both the kernels. > > I use D-Link cards (8139too driver) for the Malta 4Kc board. > > > > The setup is: > > > > netperf client <-------> malta 4Kc <---------> netperf server. > > > > The throughput statistics (in 10^6 bits/second) are: > > > > 2.6.19 2.6.20 > > routing 30.2 30.16 > > bridging 32.35 30.81 > > > > I observe that there has been a degradation in bridging performance of > > 5% in 2.6.20 when compared to 2.6.19. > > > > Has anyone observed similar behaviour? > > Any inputs or suggestions are welcome. > > In each case is the malta CPU bound? If not, some idea of the change in > CPU util might be helpful. > > rick jones > btw, netperf 2.4.3 just released: > ftp://ftp.netperf.org/netperf > http://www.netperf.org/svn/netperf2/tags/netperf-2.4.3 > - > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to [EMAIL PROTECTED] > More majordomo info at http://vger.kernel.org/majordomo-info.html I couldn't think of a worse NIC for bridging than the 8139too because that card has no direct DMA and does a data copy for each receive. -- Stephen Hemminger <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
